US Bridges

South St. (cr 647) over Salt Brook

Good

Union County, New Jersey · Near Gales Drive · Structure no. 2011007

Built
2004
21 years old
Condition
Good
inspected February 2024
Type
Slab
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
14,528
2024 count
Owner
County
County Highway Agency

About this bridge

South St. (cr 647) over Salt Brook is a prestressed concrete slab carrying South St. (cr 647) over Salt Brook in Union County, New Jersey. It was built in 2004, so it is 21 years old, younger than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,528 vehicles a day, roughly 4% of them trucks, projected to reach 17,727 by 2044. The structure is 32 ft (9.8 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouth St. (cr 647)
CrossesSalt Brook
LocationNear Gales Drive
RouteCounty Highway 647
Coordinates40.70284, -74.40538
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating83 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length32 ft (9.8 m)
Longest span26 ft (7.9 m)
Deck width66 ft (20.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,528 (2024)
Projected traffic17,727 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was South St. (cr 647) over Salt Brook built?

It was built in 2004, making it 21 years old in 2025.

What condition is South St. (cr 647) over Salt Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does South St. (cr 647) over Salt Brook carry?

About 14,528 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is South St. (cr 647) over Salt Brook?

The structure is 32 ft (9.8 m) long with a longest span of 26 ft (7.9 m) and a deck 66 ft wide.

Who owns South St. (cr 647) over Salt Brook?

It is owned by the County Highway Agency.